Illumination system - Patent 2496058

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(11)

EP 2 496 058 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.05.2014 Bulletin 2014/20

(43)	Date of publication A2:
	05.09.2012 Bulletin 2012/36

(21)	Application number: 12001312.3

(22)	Date of filing: 28.02.2012

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International Patent Classification (IPC):

H05B 37/02^(2006.01)
H05B 33/08^(2006.01)

H05B 39/08^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

04.03.2011 JP 2011048007

(71)	Applicant: Panasonic Corporation
	Osaka 571-8501 (JP)

(72)	Inventors:
	Murakami, Yoshinobu Kadoma-shi Osaka 571-8501 (JP) Nakagawara, Koji Kadoma-shi Osaka 571-8501 (JP) Ohnishi, Masahito Kadoma-shi Osaka 571-8501 (JP) Naruo, Masahiro Kadoma-shi Osaka 571-8501 (JP) Ido, Shigeru Kadoma-shi Osaka 571-8501 (JP) Nisimoto, Kazuhiro Kadoma-shi Osaka 571-8501 (JP) Mizukawa, Hiromitsu Kadoma-shi Osaka 571-8501 (JP)

(74)	Representative: Samson & Partner
	Widenmayerstraße 5 80538 München 80538 München (DE)

(54)	Illumination system

(57) An illumination system includes a lighting apparatus having a solid-state light emitting element as a light source; and a dimmer including a bidirectional switching element having a self-sustaining function and connected to a serial circuit of the lighting apparatus and an external power source. The dimmer varies a conduction angle of the bidirectional switching element by controlling a phase of an AC voltage of the external power source, wherein the lighting apparatus performs dimming of the light source based on the conduction angle of the bidirectional switching element, and the dimmer continues to apply driving current to the bidirectional switching element during a first period, which is a part of a second period, the bidirectional switching element being allowed to conduct throughout the second period.

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